1. Department of Natural Products Chemistry
2. Key Lab of Chemical Biology of the Ministry of Education
3. Shandong University
4. Jinan 250012
5. People's Republic of China
6. Department of Pharmacy
7. The Second Hospital of Shandong University
8. Jinan
9. School of Chemistry and Chemical Engineering
10. Jinan 250010
11. School of Pharmacy
12. Linyi University
13. Linyi 276000